Millisecond pulsars rotate about ________ times per second.
A. 100
B. 1,000
C. 10
D. 1 million
Answer: B
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Suppose we take a disk of radius R and remove the material from r = 0 to r = R, making a hole at the center of the disk. Note that this decreases the mass of the disk. Will the value of ? for the new object be larger, smaller, or the same as that for the original object?
A. The value of ? will be larger for the new object. B. The value of ? will be smaller for the new object. C. The value of ? is the same for both objects. D. We need to know the disk’s thickness to answer.
When a spring is stretched, its mass decreases
Indicate whether the statement is true or false
A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 40 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory?
Wave Characteristics: At a certain instant in time, the electric field of an electromagnetic wave in free space points in the -z direction, and the magnetic field points in the +y direction. In what direction is this wave traveling?
A. +x direction B. -x direction C. +y direction D. -z direction E. +z direction